Bicycle-hub.



F. J. OLSEN. BICYCLE HUB. `APPLICATION FILED MAY 9,1917. 1,249,659. l g4 P12/gemma De0.11,1917. l. A l

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rnnnnnii: Johannes etsen) or nsiiiiiainneeaann :en ernennen, nnniianir.

morons-iron.

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Specification of Letters Patent.

Patented Dec. 11, 1917.

` Application flied nay a, 1917. serial no. 167,465.

To all whom it may concern.' i

ltleit known that l, llnnnnnin Johannes lULsnn, a subject of the Kingolf Denmark, residing Eskebjerggaard pr. lyeblle, Denmarkrhave inventedanew and usetul Bicycle-Hub; and l do hereby declare the tollowing to bea full, clear, and exact de` scriptionol the saine. i

ln the known tree wheel hubs with two or more gearings," the shitting ofwhich is eflected through a so-called planet-wheel system, the gearingby means ot the planetwheels has generally been used for producing thehigh ratio et gearing, whereas the lower ratio ol gearing is obtainedwhen the parts of the hub are coupled together into a unit ol mutuallyimmovable parts so that the hub acts like an ordinary lined hub. rllh'isarrangement ol? the parts, however, has the drawback that the parts o'tthe hub are worn out7 by riding with high ratio ot gearing, which is thenormal,` while the low gearing atwhich the parts oit the hub are imlmoi/ably coupled together is but little used. Therefore it `ispreferable to arrange the parts `in such a manner that the` parts arecoupled together at the highest ratio of; gearing,

serti'ng between the planetary wheel and the sun wheel another sprocketwheel which reverses the `direction ot the motion;` `but this incursVariotis drawbacks meaning a complication ofl the hub which, especiallyowing to the liinitedspace which is at hand tor the saine,v cannot besostrong and duraranged on the sun wheel,` which element'acts y in sucha manner that by being turned ttorwaidly or backwardly,under intluenceofthe planetary wheels` the fsanie is l coupled while the shitting ot`gear `gives the lowest and proportionally little usedgearing-` This issometimes ei'lectedbylinf,

eitherto this latter or to the stationary shalt of the hub.`

ln all hitherto known hubs ci? a similar construction the shitting olthesun wheel from connection with the planetary wheel carr'er to connectionwith the stationary shalt `is elected by an arial displacement ot' thesun wheel, and this displacement is etlected independent ot theplanetary wheels and solely by ineans oil' some organ or other which isin connection withtlie sun wheel. lwlei'eby is "found an intermediateposition in which the sun wheel is neither in connection with theplanetary wheels nor coupled to the shatt, and in this intermediateposition no propulsion nor any braking can be elliected. This is anessential drawback trom which the hub forming the subject matter ol theinvention docs not suffer, the sun wheel being always in connectioneither with the planetary wheel carrier or with the station ary shalt. y

A inodilication of a hub according to the y invention is shown in thedrawing in. whichy. Figure l shows a longitudinal section ol" the hub, yy

Fig. 2 a section on the line fir-B, Fig. l,

Fig. 8 a section on the line C-D Fig. l,

Fi lis a section through the hub-casing showing the inner members inelevation,`

5 a section through the planetary wheel carrier and the clutch ou theline EMF: Fig' 4;?

Fig.

side. y

Against a shoulder on the stationary shalt a oit` the hub, Fig` l, thecone b is secured,

member al is arranged a row ol' balls `has` shown.

On the inside surface `of the planetary wheel; carrier g is arranged ayrow ol: balls 7` carrying the outer hub-casing t'. The left end ot thisruns on a row ot balls j which,

6 is a clutch member in elevatioinf` Fig. 7 the saine seen from the letthand y is found on the dish 7c on the stationary shaft a. On the surfaceof the dish ic the brakering Z is arranged in a cut groove. Thebrake-ring is prevented from revolving one of its end-surfaces bearingagainst a projection 8 on the dish 7c. 'lhe dish is turned out at theinside for a distance so that a space g is formed between the dish andthe shaft a. From the outer surface of the dish and to the inner surfaceis cut a channel l0, in which is arranged a two-armed lever n which isturnable on the tap o arranged in the dish k. This lever actuates oneend of the b vlake-ring Z. The other end of the lever engages a notch inthe member p. This latter bears with its right hand end-surface againstthe left hand end-surface of a cone r on the stationary shaft e. Betweenthe dish 7c and the member j) is found a spring s pressing the member y)against the said end-surface of the cone i. Between the left handend-surface of the member p and the dish is found a space so that themember 29 can move to the left until bearing against the dish. rlheouter surface of the member l?) is conical and can eo-act with acorrespondingly shaped surface on the clutch-member z?. Part of theouter surface of this latter is conically shaped and can co-act with athereto corresponding conical surface in the hubcasing t' as shown. Partof the inner surface of the clutch member t is provided with ascrew-thread 'u which co-acts with a corresponding screw-thread a on theouter surface of the planetary wheel carrier g.Y

In the modification shown the screw thread is shown having six-threads;however, each other screw thread is eut away in such a manner that theplanetary wheel carrier g is turnable to some extent (about l; of-arevolution) in relation to the clutch member t before this latter isaxially displaced by the screw threads. rlfhe planetary wheels f meshingwith the tooth-rim on the member l further engage the sun wheel w whichcan freely rotate on the shaft a. On the sun wheel is found a flange l1the left hand surface of which has a scarfing as shown in Fig. l. Thesun wheel a has further a prolongation or a hub on the surface of whichare found serew'threads y. These screw threads mesh with screw threadsin the clutch sleeve e; part of the inner surface of this latterpointing to the left is conically shaped so that it can be coupledtogether with a corresponding surface on the cone 1 of the shaft a. Theright hand outer surface of the clutch sleeve z is also conicallyshaped, so that it can be coupled to a corresponding inner conicalsurface 12 on the planetary wheel carrier g. InV front of this conicalsurface are found three channels '-mde Fig. 5. in these three channelsslide three projections 13, Fig. 6, the ends of'which have a scarfing14', and

these three projections are found on a special shifting member l. Theshifting member l has on its outer surface three projections 2. Figs. Gand '7, engaging the corresponding channels in the planetary wheelcarrier y (oz'alc Fig.

ln the left hand end surface. of the shifting member l are found fournotches 3, Fi G and 7, and further four other smaller notches 4l, whichmore or less deep notches are arranged alternately.

lnto these notches engage four teeth 5 on the right hand end surface ofthe ring G. The ring G has on its left hand end surface eight teethwhich mesh with eight corresponding notches in the clutch member asshown. ln order to prevent the clutch member t from following the motionof the planetary wheel carrier at the start and until the same iscoupled to the member j), a friction spring l5 is found on the clutchmember restino` against the inner surface of the hub casing The clutchmember e has a similar spring 8 resting against the inner surface of theshifting member l so as not to follow the movements of the sun wheelwhen the latter is turned forwardly or backwardly, but just beingdisplaceable in axial direction. For carrying the shifting member l tothe left serves a helical spring 9.

rfhehub works in the following manner:

In the shown position of the parts the sprocket wheels are in activityand the bicycle is pedaled with the lowest gearing. Then the chain wheele with the member (l is turned forwardly the inner tooth-rim in themember Z will turn the planetary wheels f, which will thereby tend toturn the sun wheel w in a backward direction; but thereby the clutchmember e will be displaced to the left and be coupled to the fixed shafta. Thereby the sun wheel is prevented from turning further and theplanetary wheel f now rolls on the sun wheel 0J, and through theplanetary wheel carrier g is transmitted the motion to the screw threads'0 and u and to the clutch member t, which is thereby coupled to theouter hub-casing 2'., which is thereafter turned forwardly. During thefree running the outer hub-easing z' is released from the clutch member1S'. lf shifting of gear be wanted, the tooth rim e is turned in abackward direction and thereby the member Z will turn the planetarywheels f in the same direction and these again the sun wheel in theopposite direction. At the same time the sun wheel will displace theclutch member e to the right and couple the same to the conical surfacein the planetary wheel carrier g in such a manner that the sprocketwheels become blocked up. At the same time the planetary wheel carrierin being turned in backward direction will through the shifting member 1displace the `clutch inember't to the left, because the same isretained, so that it is prevented from following the motion of theplanetary wheel carrier g. The retaining is effected by the friction ofthe spring 15 against the inner surface of the hub-casing z'. Thedisplacement is effected by the teeth 5 on the ring 6 sliding up fromthe notches 3 in the member l thereby coupling the clutch member t tothe member p and thereby being pre vented from rotating during the endof the shifting.

When the teeth 5 have slid up from the notches 3 they pass over into thelower notches d.

When pedaling forwardly the member 1 retains the teeth 5 on the ring 6,and the latter will thereby be turned forwardly and the teeth on theleft side of this ring will slide up from the notches in the clutchmember t and pass over into the other notches on the same. When this isdone the screw threads o on the planetary wheel carrier g bearingagainst the screw threads u on the clutch member t will draw the same tothe right and thereby couple the same to the hub-casing z'. At the sametime the clutch member t through the displacement to the right will pushthe scarfing on the right end surface of the member l into the sun wheela' thereby preventing the same from turning independent of the planetarywheels 7 so that the gearing is now blocked up.

The motion from the chain wheel e is now transmitted directly throughthe members d, f, g and t to the hub-casing z', and the hub now actsdirectly so that the highest ratio monica of. this patent of gearing isused. If now shifting to low gear is wanted this is effected asdescribed above.

Having thus fully described my invention, I claim as new and desire tosecure by Let ters Patent in U. S. A.:

l. A bicycle hub with coaster brake and a plurality of speed ratioscomprising a stationary shaft; a planetary gearing consisting of anouter toothed rim, a planetary wheel carrier having wheels meshing withthe said toothed rim, and a sun wheel; means for coupling the said sunwheel to the said stationary shaft when the said sun wheel is turned inone direction; and means for coupling said sun wheel to the saidplanetary wheel carrier when the said sun Wheel is turned in the otherdirection.

2. A bicycle hub with coaster brake and a plurality of speed ratioscomprising a stationary shaft; a planetary gearing consisting of anouter toothed rim, a planetary wheel carrier having wheels meshing withthe said toothed rim, and a sun wheel; a clutch member on the said sunwheel adapted to couple the same to the said stationary shaft or to thesaid planet wheel carrier; mea-ns whereby the parts may be coupledtogether to form a fixed clutch; said clutch.

being inoperative when the parts of the hub are coupled together.

In testimony whereof I have ailixed my signature in presence of twowitnesses.

FREDERIK JOHANNES ULSEN. Witnesses Visco BLOM, Gncir. V. ScHoM.

may be obtained tor ve cents each, by addressing the Commissioner o!latents,

Washington, D. G.

